The Fen Line (sometimes Fenline without the space) runs from Cambridge in Cambridgeshire to King's Lynn in Norfolk, in East Anglia, England. It is so called because it runs through The Fens.
The towns and villages served by the route are listed below.
Train services on the line are operated by several train operating companies. First Capital Connect operate through services to London King's Cross via Cambridge and Stevenage. These services operate non-stop between London and Cambridge for most of the day, as part of the half-hourly "Cambridge Cruiser" service. One train an hour is extended beyond Cambridge to serve all stations to King's Lynn.
These services usually use Class 365 electrical multiple units, although Class 317 units are used occasionally. Three Class 365 EMU's have received names associated with the line. The Fenman (365 518) was previously a "named train" that used to operate on this line, consisting of a locomotive-hauled Inter-City service. FLUA 21 (365 527) was named on 10th March 2006 after the 21st Anniversary of the Fen Line Users Association. Nelson's County (365 531) had a special livery applied to the outside which shows various scenes of West Norfolk.
'one' operate some direct services from London Liverpool Street to King's Lynn via the West Anglia Main Line and Fen Line. These services operate only during the morning and evening peaks, and use Class 317/6 units (the refurbished ones with fewer, higher seats). The section between Cambridge and Ely is also used non-stop by Central Trains services to Stansted Airport, and by 'One' services between Cambridge and Norwich via the Breckland Line.
The route was electrified at 25 kV AC overhead in 1992. Electric services started to King's Lynn from 28th August 1992.
The line has an active Users Association..

Cambridge
Waterbeach
Ely
Littleport
Downham Market
Watlington
King's Lynn